City Coast Motorcycles staff have been left shattered by the break-in, which happened under the cover of darkness on Monday morning and also saw a nearby Wollongong City Council depot robbed of fuel.

CCTV vision of the robbery, which is being investigated by police, shows a person checking out the bikes inside the Keira Street business and later wheeling one away.

Two bikes were taken during the raid; a 2019 Yamaha YZ450F worth about $12,000 and a 2019 Yamaha YZ85 valued at $6500.

Police are also investigating the involvement of a silver four-wheel drive, which was seen in the area at the time.

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City Coast Motorcycles manager Timothy Sim said investigators had "a couple of rough leads" but the perpetrators were yet to be found on Tuesday morning.

Mr Sim said a person first gained entry to the council depot next door to the shop, after cutting their way through the fence about 12.20am on Monday.

They then broke an external security camera, to avoid being caught on CCTV, and used bolt cutters and a crowbar to force entry to the motorcycle business.

Mr Sim said the person got through a roller door into the shop, before cutting their way out another door and fence.

"They also stole fuel from the council depot and tried to start both bikes," he said.

"They got one bike going and rode it off through the park.

"The other one they couldn't get started, so they hid it and then came back about an hour-and-a-half later and wheeled it away."

Mr Sim said a large, silver four-wheel drive was also involved in the break-in and police were trying to identify it. CCTV cameras captured the car outside the shop about 3.30am.

"If anyone's got any other footage of that silver car at those hours, we need to get a number plate or we need a better photo of that car," he said.

"It's got tinted windows and it's quite large."

The vehicle was initially thought to be a Toyota, but it's believed it could have been a Kia.

"It'd be awesome if someone locally in the same street might have some other footage," he said.

It is understood two people were involved in the incident - the person who broke into the shop and another in the car.

Mr Sim said the business had been left rattled by the break-in.

"We're shattered, it's very upsetting," he said.

"We try so hard and when they come and take it from us it's very upsetting."

Mr Sim described the break-in as "very strange" given the associated fuel theft.

"I don't know if they were lucky or planned the whole thing," he said.

"They did make it look easy, even though it wasn't an easy thing to do."

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Mr Sim said the business hadn't been broken into for a number of years.

However, he said there was an incident in March that involved someone taking a bike while the shop was open.

Police are now investigating whether that incident, which was also captured on video, and Monday morning's break-in are linked.

The stolen bikes have the following identification details:

Anyone with information should call Wollongong police on 4226 7899 or Crime Stoppers on 1800 333 000.